Paint spray apparatus, including insulated supply pipe



March 5, 1957 J. SEDLACSIK PAINT SPRAY APPARATUS, INCLUDING INSULATED SUPPLY PIPE Filed April 4, 1956 a IN V ENTOR. /d2 My)? United States Patent PAINT SPRAY APPARATUS, INCLUDING INSULATED SUPPLY PIPE John Sedlacsik, Garfield, N. J. Application April 4, 1955, Serial No. 499,815 1 Claim. (Cl. 317-3) This invention relates to improvements in the electrodepositing of coating material on metal and non-metal objects and is directed more particularly to the depositing of metal carrying liquid coating materials, sometimes called metallic paint.

It is Well known in coating operations to coat objects by spraying coating materials from a device to an object with the device and object being at different electrical potentials. The voltages are ordinarily high, say in the neighborhood of 100,000 volts, and where metallic coating is employed, there is an inherent tendency of feed back.

According to the novel features of this invention, apparatus is provided to overcome and eliminate the daugers and objections in connection with electro-coating where coating materials containing metallic substances are employed.

The novel objects of the invention are accomplished by the provision of an elongated circuitous conduit for the flow of metallic coating material from a supply thereof to a discharge means. The conduit will be formed from insulating material and arranged with reference to the electrical potential of the discharge means and object being coated so as to resist and eliminate feed back.

All of the above cited objects I accomplish by means of such structure and relative arrangement of parts thereof, as will fully appear by a perusal of the description below and by various specific features which will be hereinafter set forth.

To these above and other ends and with the foregoing and various other and ancillary features and advantages and objects of my invention as will become more readily apparent as the description proceeds, my invention consists in certain features of novelty, in a mode of operation, and in the combination, organization, and arrangement 'of parts as will be hereinafter more particularly pointed out in the claim hereunto annexed and more fully described and referred to in conjunction with the accompanying drawings wherein:

Fig. 1 is a diagrammatic elevational view to illustrate the novel features of the invention; and

Fig. 2 is a plan view of the coil of the invention.

Referring now to the drawings in detail, the invention will be fully described.

A container is represented by 2 for a supply of coating material containing a metallic substance. Such is commonly called metallic paint.

A tank 4 is for compressed air of a pressure for spraying purposes and may be connected in the well known manner to a compressed air supply such as an air compressor.

The tank 4 may be connected by a pipe 6 to the coating supply tank 2 to facilitate the flow in the correct amount and at the desired pressure of coating material from said tank 2.

ice

A tube 8 connects the air supply tank 4 to a device 10 for spraying the coating material. Said device 10 may be of any desired well known form commonly employed in the industry. The device 10 will be connected through a lug 12 to one side of a source of energy (not shown) the other side of which will be connected to the object being coated. The potential in connection with electro-coating is ordinarily high. Therefore, where metallic coating material is used, the feed back tendency from the spraying device results in very dangerous conditions.

To overcome the feed-back, a conduit 14 is provided from the coating supply tank which is connected by a flexible or other pipe 16 to the discharge or spray device 10. The conduit is coiled in convolutions 20 about and supported by a tubular support member 22. End portions 24 of the support member 22 are supported on the ends of insulators 26 which in the form of the invention being disclosed are secured to a wall W or the like.

The conduit 14 and the coil thereof are formed from insulating material. Polyethylene tubing or the like has been found to be suitable for the practice of the inventron.

The support 22 is formed from insulating material and the insulators 26 or other suitable means are such as to isolate the coil from nearby objects and overcome the possibility of are over.

The coiled conduit may be of such dimensions as to diameter and length as will provide an elongated cir cuitous passageway for the metallic coating material and as will result in the eliminations of feed back.

The coil resists and impedes feed back and it may be arranged with relation to the electrical potential to effectively resist and eliminate electrical feed back and thereby overcome the hazards and dangers attendant on feed back.

The invention may be embodied in other specific forms Without departing from the essential characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the appended claim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

Apparatus for overcoming electrical feed back resulting from discharging a metallic coating material toward an object from a coating material spraying device with the object and coating material spraying device being connected to opposite poles of av high potential source comprising, an elongated conduit connected between a source of supply of the metallic coating material and the coating material spraying device and being arranged as a coil to provide a circuitous material conduit, said coil being formed from electrical insulated material, and means supporting said coil in electrically isolated position, said coil resisting feed back as metallic coating material flows therethrough.

References Cited in the file of this patent UNITED STATES PATENTS 2,546,701 Ransburg Mar. 27, 1951 

